Unrecognised extension not getting removed on Brave Browser for Windows

[Rethanis]

Sounds like you might have to manually remove the extension from your computer’s registries.

Take a look at my reply in the thread below, and try to find the appropriate directories. I’m running an old version of Windows so won’t be able to tell you the exact path to the directories.

What is Brave's registry location for extensions?

Brave uses Chrome’s registry directory. I had to deal with a nasty extension that kept re-installing itself automatically every time I created a user profile, and eventually clearing HKEY_LOCAL_MACHINE\Software\Google\Chrome\Extensions fixed the issue, so Brave fetches data from Chrome’s registries.

P.S I just found an article that describes the exact path:

https://www.chromium.org/administrators/pre-installed-extensions

Check the following directories:

HKEY_LOCAL_MACHINE\SOFTWARE\Google\Chrome\Extensions
HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Google\Chrome\Extensions